Title :
An integrated digital controller for DC-DC switching converter with dual-band switching
Author :
Martin Yeung-Kei Chui ; Wing-Hung Ki ; Chi-Ying Tsui
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China
Abstract :
A 0.6 /spl mu/m CMOS integrated digital PID controller for a buck converter is presented. It consists of: (1) a VCO driving a counter to serve as an ADC; (2) a PID compensator that employs variable integration times for enhancing accuracy and stability, and (3) a dual-band switching PWM generator with a modified tapped delay line for better output resolution and area efficiency. The converter switches at 1 MHz, while the tracking time is 50 /spl mu/s for a step change of 1 V.
Keywords :
CMOS digital integrated circuits; DC-DC power convertors; PWM power convertors; controllers; switching convertors; three-term control; voltage-controlled oscillators; 0.6 micron; 1 MHz; 1 V; 50 mus; CMOS integrated digital PID controller; DC-DC switching converter; PID compensator; PWM generator; VCO; buck converter; converter switches; dual-band switching; integrated digital controller; Buck converters; Counting circuits; Delay lines; Digital control; Dual band; Pulse width modulation; Stability; Switching converters; Three-term control; Voltage-controlled oscillators;
Conference_Titel :
VLSI Circuits, 2003. Digest of Technical Papers. 2003 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
4-89114-034-8
DOI :
10.1109/VLSIC.2003.1221157
